Ecological-Based Mining:A Coal-Water-Thermal Collaborative Paradigm in Ecologically Fragile Areas in Western China

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外文摘要：A substantial reduction in groundwater level,exacerbated by coal mining activities,is intensifying water scarcity in western China's ecologically fragile coal mining areas.China's national strategic goal of achiev-ing a carbon peak and carbon neutrality has made eco-friendly mining that prioritizes the protection and efficient use of water resources essential.Based on the resource characteristics of mine water and heat hazards,an intensive coal-water-thermal collaborative co-mining paradigm for the duration of the min-ing process is proposed.An integrated system for the production,supply,and storage of mining compan-ion resources is achieved through technologies such as roof water inrush prevention and control,hydrothermal quality improvement,and deep-injection geological storage.An active preventive and con-trol system achieved by adjusting the mining technology and a passive system centered on multi-objective drainage and grouting treatment are suggested,in accordance with the original geological char-acteristics and dynamic process of water inrush.By implementing advanced multi-objective drainage,specifically designed to address the"skylight-type"water inrush mode in the Yulin mining area of Shaanxi Province,a substantial reduction of 50％in water drillings and inflow was achieved,leading to stabilized water conditions that effectively ensure subsequent safe coal mining.An integrated-energy complementary model that incorporates the clean production concept of heat utilization is also proposed.The findings indicate a potential saving of 8419 t of standard coal by using water and air heat as an alter-native heating source for the Xiaojihan coalmine,resulting in an impressive energy conservation of 50.2％and a notable 24.2％reduction in carbon emissions.The ultra-deep sustained water injection of 100 m3·h-1 in a single well would not rupture the formation or cause water leakage,and 7.87 x 105 t of mine water could be effectively stored in the Liujiagou Formation,presenting a viable method for mine-water management in the Ordos Basin and providing insights for green and low-carbon mining.

外文关键词：

Dual carbon targetsCoal-water-thermal co-miningEcologically fragile areasMine-water controlResource utilization

作者：

Xiaoxiu Liu、Yifan Zeng、Qiang Wu、Shihao Meng、Jiyue Liang、Zhuping Hou

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作者单位：

National Engineering Research Center of Coal Mine Water Hazard Controlling,China University of Mining and Technology,Beijing 100083,China

College of Geoscience and Surveying Engineering,China University of Mining and Technology,Beijing 100083,China

University of Mining and Technology(Beijing)Inner Mongolia Research Institute,Ordos 017000,China

基金：

National Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of China

项目编号：

2021YFC2902004420722844202780141877186

出版年：

2024

DOI：

10.1016/j.eng.2024.01.019

工程(英文)

CSTPCDEI

ISSN：2095-8099

年,卷(期)：2024.38(7)